I've been working on a new time line that allows multiple layers. You'll see two time lines in the picture. The bottom is the old one. The top one is the one I am working on. It shows two layers but it will allow you to add as many as you want. I have been doing a lot of optimization so when you scroll the repaint is immediate, unlike Mamba Black where when you scroll it takes a moment to update. I still have a lot to do, though.